But he kept her in the dark about the foreign bank accounts he was using to buy millions in luxury items and pay personal expenses.

The bookkeeper's testimony Thursday appears to undercut an argument by Manafort's defense attorneys that he can't be responsible for financial fraud because he left the details of his spending to others.

Manafort faces charges of bank fraud and tax evasion that could put him in prison for the rest of his life. It's the first courtroom test of Mueller's team